Manufacture of white enamel, glass, and the like.



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IGNAZ KREI DL, 0F VIENNA, AUSTRIA-HUNGARY.

MANUFACTURE or WHITE ENAMEL, eLAss, AND THE LIKE.

No Drawing.

To all whom it may concern:

Be it knownthat I, Dr. IGNAZ Kin-nun, partner of the firm Vereinigte chemische Fabriken, Landau, Kreidl, Heller & (10., of Sebastiankohlgasse 5-7, Vienna, XXI, a subject of the Emperor of Austria-Hungary,

compoundscontaining a'small quantity-of alkali, are employed'as opaquing agents. A suitable alkali content for such compounds is found to be. from 24%; see my specification accompanying application No. 728558.

Now the present invention is based on my discovery that the op'aquing power of the hydrates of metal compounds used as an opaquing agent depends not only upon the percentage ofcontaine'cl alkali, but also on the-quantity of the combined water of hydration contained in the said hydrates. I have discovered that the same opaquing power can be produced with a large percentage, as with a smaller percentage of a al-i, if the percentage of, the water of dration. in the hydrates used be .varied to correspond.

I have discovered that as the percentage of alkali used is greater, so the percentage of water of hydration must be smaller, and that with a smaller percentage of alkali the percentage of water of hydration must be greater in order to produce the same opaquing poo-er. From this, I have deduced the principle of my present invention ac cording to which every hydrate suitable as opaquing agent will produce its maximum opaquing power when it contains a definite percentage of alkali'which varies for each hydrate.

The most favorable percentages of combined alkali and Water of hydration for each I hydrated compound used as opaduing agent can be readily ascertained by trial.

What I claim is: I 1. An opaquing agent for enamels, con- Specification of Letters Patent.

Application filed March 15, 1913. Serial No. 754,531.

Patented Feb. 16, 1915.,

sisting of ametallic hydrate containing combined alkali, said hydrate containin water in inverse proportion to the combined alkali present.

An opaquin'g agent for enamels'consist ing of a metallic hydrate poor in alkali and containlng water in inverse proportion to the alkali in the compound.

3. An opaquing agent for enamels con sisting of a metallic hydrate containing 2%- 7% combined alkali and'wate'r in inverse proportion to the alkali present in thefconipound. n

4;. An opaquing agent for enamels consisting of a hydrated zirconium compound ppor in alkali and containing water in, inverse proportion to the alkali 1n the compoumh 5. An opaqumg agent for enamels com.

sisting of a hydrated zirconium compound containing 2%7% combined alkali and wa ter in inverse proportion to the alkali pres ent in the compound.

6. A process of manufacturing opaquiklg agents for enamel comp-rising dehydrating an, alkali containing metallic hydrate .*to such an extent that the water remaining is in inverseproportio'n to the alkali present in the compound.

7 .'A process of manufacturing opaquing agents for enamel comprising dehydratin, a metallic hydrate containing 2%7% alkau to such'an extent that the water remaining is in inverse proportion to the alkali pres' ent in the compound.

8. The process of manufacturing opaquing agents'for enamel comprising dehydrating an alkali-containing zirconium hydrate to such an extent that the water remaining is in inverse proportion to, the alkali present in the compound.

9. A process of manufacturing opaquinc;

agents for enamel comprising dehydrating a zirconium hydrate containing 91.4524. alkali to such an extent that the water rclnaining, is'in inverse proportu'm to the alkali present in the compound.

in witness whereof, i have hereunto signed my name in the presence of two subscribing witnesses.

'Dn. IGNAZ KREIDL.

Witnesses:

Hnso REIK, Ausus'r Fuoonn. 

